Armature for electric meters



(No Model.)

0. B. SHALLENBERGER.

ARMATURE FOR ELECTRIC METERS.

No. 426,335. Patented Apr. 22, 1890.

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dcezfflesses. p nvz'nfor M A; for/nil] a 04% a k UNITED STATES PATENT OFFICE.

OLIVER B. SI'IALLENBERGER, OF ROCHESTER, ASSIGNOR TO THE \VESTING- HOUSE ELECTRIC COMPANY, OF PITTSBURG, PENNSYLVANIA.

, ARMATURE FOR ELECTRIC METERS.

SPECIFICATION forming part of Letters Patent No. 426,335, dated April 22, 1890.

Application filed January 16, 1890- Serial No. 337.077. (N0 model.)

To all whom it may concern.-

Be it known that I, OLIVER B. SHALLENBER- GER, a citizen of the United States, residing in Rochester, county of Beaver, and State of Pennsylvania, have invented a certain new and useful Improvement in Electric Meters, (Case No. 379,) of which the following is a specification.

The invention relates particularly to the construction of armatures for that class of alternating-current electric meters described in patents issued to me August 14, 1888, Nos. 385,003 and 388,004. Such meters are constructed with a rotating armature acted upon by two inducin g-conductors having their magnetic axes at an angle with each other. Means are further provided for governing the rate of revolution of the armature and registering the number of revolutions. A description of the operation of the apparatus may be found in the patents above referred to.

The present invention relates particularly to the construction of the armature; and it consists in constructing the armature of a ring of magnetizable material carried by a disk of aluminium. The use of the aluminium disk renders the armature very light. This disk is spun into the ring, and is provided with annular corrugations, which serve to stiffen the metal. At the center of the disk there is carried a quill which receives the shaft. This quill may be of brass or any other suitable material. The disk itself may be fastened to the ring near one edge of the ring, forming a shallow cup. The disk may be sprung outward at the center or rendered convex for the purpose of affording more room for the quill and permitting a longer one to be used,

In the accompanying drawings,Figure 1 is a cross-section of the armature, and Fig. 2 is a plan of the same.

Referring to the drawings, a represents the shaft of the meter, and Z) the magnetic portion of the armature. This is shown as being of nearly rectangular cross-section, and may with advantage be of slightly-greater radial than vertical dimensions. By so disposing the mass of magnetic metal of the. armature it presents more extended surfaces to the circuit which acts upon it than if of greater vertical than radial dimensions, for a coil passing above and below is in proximity to both surfaces, whereas if the same amount of metal were disposed in a form presenting greater vertical dimensions, then the addition 5 5 to the exterior surface would be acted upon only by the portion of the inducing-conductor passing outside of it, and the corresponding inner surface would not be directly utilized. In other words, this form exposes more sur- 6o face to be acted upon than if of greater vertical than radial dimensions when a given mass of magnetic metal is used. The inner portion of the ring is here shown as provided with an inwardly-proj ecting lug c, and the aluminium disk is placed upon the lug and the metal of the ring turned down upon the disk. The disk is corrugated, as shown at f, these corrugations serving to strengthen it, and at the center of the disk thereis secured a quill 7L, which is designed to slip over the shaft of the meter and hold the entire armature in proper position. This quill may be carried by a hub e, which may be spun into the disk. The disk itself may be sprung upward, so that 7 5 the quill may be as long as possible and still not project far below the bottom of the ring I).

I claim as my invention- 1. An armature for alternating-current elec tric meters, consisting of a ring of magnetiza- 8c ble material and a central supporting-disk of aluminium carrying the ring.

2. An armature for alternating-current electrio meters, consisting of a ring of magnetizable material and a supporting-disk of alumini- 8 5 um spun into the ring.

8. An armature for alternating-current electric meters and a corrugated supporting-disk of aluminium, substantially as described.

Al. In an armature for alternating-current electric meters, a ring of magnetizable material of greater radial than vertical cross seetion.

5. In an armature for alternating-current electric meters, a magnetizable ring of approximatcly rectangular cross-section, havin an irmardly-proj eotin g lug and a separate sup port therefor, substantially as described.

0. In an armature for alternating-current electric meters, a magnetizable ring of ap- I00 proximately rectangular cross-section,having an inwardly-proj ccting lug and a supportingdisk fastened into the edge of said lug, snb- In testimony whereof I have hereunto substantially as described. scribed Inyname this 14th day of January, A.

7 In an armature for alternating-current I). 1890.

electric meters, 2 magnetiza ble ring, an alu- OLIVER B. SHALLENBERGER.

minium disk spun into the ring, a central \Vitnesses:

quill, and a hub carrying the quill and sup- SAML. R. ROSEMAND,

ported from the disk. JAMES W. SMITH. 

